How to append a string on an array?

Question

Lets say I have an array field in a document:

entries: ["hello"]

I would like to append new elements to this array field i.e ["Yellow" ,"Blue"]

I did some research and most the techniques replace the entire record. How can I achieve this?

I'm using javascript.

what language are you using? do you have more sample code? more context would be useful. — matias elgart, Feb 09 '18 at 04:42
what context do you need? i have an array field. how do i add elements to it without overwriting the whole field? — maxflow, Feb 09 '18 at 04:46

score 2 · Accepted Answer · answered Feb 09 '18 at 05:03

And looks like you are developing using firebase firestore, please take a look at their documentation here.

You'll have to retrieve the document you want to edit first, append the array, then update it.

1 Answers1